KR101797339B1 - Lantern for lighthouse by using a laser diode and phosphor - Google Patents

Abstract

A light guide lamp for a lighthouse using a laser diode and a phosphor is disclosed. The illuminator includes a power supply unit; A laser diode to which power is supplied from the power supply unit and which emits laser in one direction; A phosphor positioned on the laser traveling line and emitting light as the laser is incident; And a pair of reflectors sandwiching the fluorescent material, wherein each of the reflectors includes a reflective surface that is inclined in a direction away from the fluorescent material, and the reflective surface is arranged to be symmetrical with respect to each other with the fluorescent material therebetween, . The use of such a name changer has the advantage of improving power efficiency because it can generate a high output even at low power, and it can improve vulnerability of frequent breakdown near sea or seawater and reduce production cost.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a luminescent lamp,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a name changer, and more particularly, to a name changer capable of outputting a high output even at a low power.

Conventional incandescent lamps use a mechanical structure called a bulb exchanger to rotate a socket member provided with a plurality of incandescent lamps to drive a motor mounted in a bulb exchanger when a current incandescent lamp fails, As shown in FIG.

However, such an old-fashioned headset requires frequent maintenance and repair of the power supply unit due to inefficient use of the power supply, and shortens the durability of the battery.

Accordingly, a light emitting diode (LED) having a higher luminance than an incandescent lamp has recently been developed and used. In such an LED indicator lamp, a plurality of LED modules for emitting light are stacked on the upper portion of the lighter body, and each of the LED modules is designed to be electrically connected to the power supply section of the control module and operated by a power source supplied from the battery .

In the conventional luminaires using the LED, the luminous intensity of the LED module itself is relatively higher than that of the incandescent lamp. However, when the LED module is stacked and used, the lower cover plate presses the lens portion of the LED module The light emitting range of the light radiated to the outside is narrowed. Therefore, the luminous intensity of this portion is relatively lower than that of the lens portion of the LED module, and the luminous intensity of the entire luminaires is lowered.

On the other hand, the lighthouse is mostly installed near the sea or seawater, and in the case of the conventional lighthouse using the LED, the failure frequently occurs due to the corrosion of the LED module.

It is an object of the present invention to provide a lifting device capable of improving power efficiency by being capable of outputting high power even at low power, capable of improving vulnerability of frequent failures near sea or sea water, and reducing production cost .

The present invention relates to a power supply apparatus, A laser diode to which power is supplied from the power supply unit and which emits laser in one direction; A phosphor positioned on the laser traveling line and emitting light as the laser is incident; And a pair of reflectors sandwiching the fluorescent material, wherein each of the reflectors includes a reflective surface that is inclined in a direction away from the fluorescent material, and the reflective surface is arranged to be symmetrical with respect to each other with the fluorescent material therebetween, The present invention provides a lamp unit for a lighthouse using a laser diode and a phosphor.

In one embodiment, the fluorescent material may be a fluorescent material dispersed in an inorganic material having a predetermined shape, or may be spherical. For example, the phosphor may be selected from the group consisting of (Y, Tb) ₂ Al ₅ O ₁₂ : Ce ³⁺ , (Sr, Ba, Ca) ₂ Si ₅ N ₈ : Eu ²⁺ , CaAlSiN ₃ : Eu ²⁺ , BaMgAl ₁₀ O ^{_{17: Eu 2+, BaMgAl 10 O}} 17: Eu 2+, Mn 2+, Ca-alpha-SiAlON: Eu 2+, Beta-SiAlON: Eu 2+, (Ca, Sr, Ba) 2 P 2 O 7: ^{Eu 2+, (Ca, Sr,} Ba) 2 P 2 O 7: Eu 2+, Mn 2+, (Ca, Sr, Ba) 5 (PO 4) 3 Cl: Eu 2+, Lu 2 SiO 5: Ce ^{3+, (Ca, Sr, Ba} ) 3 SiO 5: Eu 2+, (Ca, Sr, Ba) 2 SiO 4: Eu 2+, Zn 2 SiO 4: Mn 2+, BaAl 12 O 19: Mn 2+ ^{_{, BaMgAl 14 O 23: Mn 2+}} , SrAl 12 O 19: Mn 2+, CaAl 12 O 19: Mn 2+, YBO 3: Tb 3+, LuBO 3: Tb 3+, Y 2 O 3: Eu 3+ ^{_{, Y 2 SiO 5: Eu 3+}} , Y 3 Al 5 O 12: Eu 3+, YBO 3: Eu 3+, Y 0.65 Gd 0.35 BO 3: Eu 3+, GdBO 3: Eu 3+ , and YVO _4: Eu ³⁺ . &^Lt; / RTI >

In one embodiment, the pair of reflectors is conical in shape, and the pair of reflectors is arranged such that the vertex of the cone is located on the laser advancing line, and the phosphor is positioned at the position of the vertex of the cone of each reflector And one of the pair of reflectors may be opened at the vertex position so that the laser is incident on the phosphor.

The use of the reflector according to the present invention improves power efficiency because it can generate a high output even at low power and can improve the vulnerability of frequent breakdown near sea or seawater and can reduce production cost have.

1 is a view showing a schematic configuration of a reflector according to the present invention.
2 is an exploded perspective view showing an embodiment of a lighting apparatus according to the present invention.
3 is a cross-sectional view of the connection of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 is a view showing a schematic configuration of a reflector according to the present invention.

Referring to FIG. 1, a reflector according to an exemplary embodiment of the present invention includes a power supply unit 100, a laser diode (LD) 200, a phosphor 300, and a pair of reflectors 400.

The power supply unit 100 supplies power to the laser diode 200. The power supply unit 100 may be configured to supply external commercial power, or may be configured in the form of a solar cell.

The laser diode 200 receives power from the power supply unit 100 to emit a laser beam. The laser diode 200 is an element for amplifying light by induced emission. The light output from the laser diode 200 is excellent in monochromaticity, has a uniform phase, and is excellent in the light-converging property without being spread when traveling, and has an output higher than that of the LED. The laser diode 200 is the smallest and lightest among all kinds of lasers, and can be mass-produced at a low cost through a semiconductor process. The laser diode 200 irradiates the laser in one direction.

The phosphor 300 emits light as the laser irradiated from the laser diode 200 is incident. The phosphor 300 is positioned on the laser progression line for the laser diode 200 to be incident. The phosphor 300 may be in the form of a fluorescent material (phosphor) dispersed in an inorganic material. For example, the phosphor 300 may be in the form of a fluorescent material dispersed in an inorganic material of any one of glass, ceramics, and single crystals.

For example, the fluorescent material may be selected from the group consisting of (Y, Tb) ₂ Al ₅ O ₁₂ : Ce ³⁺ , (Sr, Ba, Ca) ₂ Si ₅ N ₈ : Eu ²⁺ , CaAlSiN ₃ : Eu ²⁺ , BaMgAl ₁₀ O ₁₇ : Eu ²⁺ , BaMgAl ₁₀ O ₁₇ : Eu ²⁺ , Mn ²⁺ , Ca-alpha-SiAlON: Eu ²⁺ , Beta-SiAlON: Eu ²⁺ , (Ca, Sr, Ba) ₂ P ₂ O ₇ : Eu ^{2+, (Ca, Sr, Ba} ) 2 P 2 O 7: Eu 2+, Mn 2+, (Ca, Sr, Ba) 5 (PO 4) 3 Cl: Eu 2+, Lu 2 SiO 5: Ce 3 ^{+, (Ca, Sr, Ba} ) 3 SiO 5: Eu 2+, (Ca, Sr, Ba) 2 SiO 4: Eu 2+, Zn 2 SiO 4: Mn 2+, BaAl 12 O 19: Mn 2+, ^{_{BaMgAl 14 O 23: Mn 2+,}} SrAl 12 O 19: Mn 2+, CaAl 12 O 19: Mn 2+, YBO 3: Tb 3+, LuBO 3: Tb 3+, Y 2 O 3: Eu 3+, ^{_{Y 2 SiO 5: Eu 3+,}} Y 3 Al 5 O 12: Eu 3+, YBO 3: Eu 3+, Y 0.65 Gd 0.35 BO 3: Eu 3+, GdBO 3: Eu 3+ , and YVO _4: Eu ^{3 +} . ≪ / RTI >

The phosphor 300 is preferably spherical in order to emit light in multiple directions.

The pair of reflectors 400 reflects light emitted from the phosphors 300 and scatters them in multiple directions. Each of the reflectors 400 includes a reflecting surface 410 and is disposed such that the reflecting surfaces 410 are symmetrical with respect to each other with the phosphor 300 therebetween. The reflective surface 410 is formed in a shape inclined in a direction away from the phosphor 300. For example, it may be formed in a shape inclined in a direction away from one vertex. When the phosphor 300 positioned between the reflecting surfaces 410 disposed symmetrically with respect to each other emits light and reflects the emitted light, the pair of reflectors 400 reflect the emitted light to scatter around the phosphor 300 .

Meanwhile, the illuminator according to the present invention further includes a Fresnel lens 500.

The Fresnel lens 500 is a lens that converts diffused light beams diffused from a point light source into linear light beams close to the laser. Therefore, the Fresnel lens 500 converts the light emitted from the phosphor 300 to the reflection surface 410 of the pair of reflectors 400 so that the diffused light has a linearity. To this end, the Fresnel lens 500 is disposed around the pair of reflectors 400 so as to surround the pair of reflectors 400.

FIG. 2 is an exploded perspective view showing an embodiment of a luminaires according to the present invention, and FIG. 3 is an assembled cross-sectional view of FIG.

2 and 3, according to an embodiment of the present invention, the laser diode 200 and the power supply unit 100 may be installed in a cylinder-shaped sunburner body 10. At this time, the laser diode 200 may be installed to irradiate the laser toward the upper end of the body 10. For example, the laser diode 200 may emit blue light having a wavelength range of about 475 nm or less (for example, between 400 nm and 550 nm).

A lid 20 covering an upper end portion of the light emitting body 10 may be coupled to the upper end of the light emitting body 10. For example, the lid 20 can be rotatably connected to one side of the upper end of the light emitting body 10, and an opening 21 through which the laser irradiated from the laser diode 200 passes is formed at the center of the lid 20 .

A pair of reflectors 400 may be coupled to the upper surface of the lid 20. For example, each reflector 400 may be conical in shape, in which case the reflective surface 410 is inclined to be away from the vertex of the conical shape, and the vertexes of the conical shape are symmetrically disposed . The shape of the pair of reflectors 400 to be coupled to the upper surface of the lid 20 is not particularly limited. For example, a reflector 400, which is coupled to the upper surface of the lid 20, The flange portion 400a may be formed around the lower portion of the cover 400 so as to engage with the lid 20 and the position of the vertex may be opened so that the laser passes therethrough.

The phosphor 300 is provided between the pair of reflectors 400. The phosphor 300 is provided in a spherical shape. At this time, the phosphor 300 is positioned at the position of the vertex of the conical shape, and the laser is positioned above the open vertex of the reflector 400 coupled with the lid 20. The phosphor 300 emits light when a laser is incident, and emits light. For example, light emitted from the phosphor 300 may have a wavelength close to that of white light.

The Fresnel lens 500 may be coupled to the upper surface of the lid 20 so as to surround the pair of reflectors 400 by receiving the pair of reflectors 400 therein. For example, the Fresnel lens 500 may have a hollow cylindrical shape in which the upper surface portion is closed and the lower surface portion is open. The shape of the Fresnel lens 500 coupled to the upper surface of the lid 20 is not particularly limited. For example, the annular portion 500a may be formed at the lower end of the cylindrical shape of the Fresnel lens 500, The fixing ring 30 pressing the annular portion 500a may be coupled to the lid 20 to fix the Fresnel lens 500. [

Although not shown, a control module for receiving power from the power supply unit 100 and controlling the power supply of the laser diode 200 from the power supply unit 100 may be installed inside the light emitting body 10. [

Hereinafter, a description will be given of a process in which a phosphor emits light by a luminous phosphor.

First, the laser diode 200 receives power from the power supply unit 100 and irradiates the laser toward the phosphor 300.

The irradiated laser is incident on the phosphor 300 through the opening 21 of the lid 20 and the open apex of the conical shape of the reflector 400 coupled to the lid 20.

When the laser is incident on the phosphor 300, the phosphor 300 emits light and emits light close to the white light.

The light emitted from the phosphor 300 travels toward the reflection surface 410 of the pair of reflectors 400 and is reflected by the reflection surface 410 and scattered in multiple directions and proceeds toward the Fresnel lens 500 .

The light scattered through the pair of reflectors 400 is condensed by the Fresnel lens 500. The Fresnel lens 500 converts the condensed light into a straight line so as to convert the condensed light into a straight line in the 360 degree direction around the Fresnel lens 500 .

The luminescent unit according to the present invention is configured to emit light by using the laser diode 200 and the phosphor 300. As mentioned above, the laser diode 200 has a characteristic of excellent convergence, And when the laser irradiated from the laser diode 200 is incident on the phosphor 300, the phosphor 300 can emit light with high output. Therefore, the luminous means according to the present invention can generate a high output even at a low power as compared with the prior art which uses LED as a light emitting source, thereby achieving a power efficiency improvement of 50% or more.

In addition, since the substrate having the LED chip is not used as in the conventional art, the weak point of the failure due to the corrosion of the light emitting module can be improved.

In addition, since the laser diode 200 capable of mass production at a low cost is used, the production cost of the light emitting device can be reduced.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

Claims (6)

A pair of reflectors including a reflective surface that is conical in shape and that is symmetrically arranged symmetrically with respect to the vertex of the cone and that extends in a direction away from the vertex of the cone and is inclined so that the diameter gradually increases;
A phosphor positioned at a position of a vertex of a cone of the pair of reflectors and having a spherical shape;
A laser diode disposed on a center line of the cone and irradiating a laser toward the phosphor;
And a reflector disposed around the pair of reflectors so as to surround the pair of reflectors so that the light scattered at the entire height of the conical shape through the reflection surface is transformed to have a straight line, A Fresnel lens that emits in the direction of the arrow; And
And a power supply unit for applying power to the laser diode.
Lighthouse lamps using laser diodes and phosphors. delete The method according to claim 1,
Wherein the fluorescent material is a fluorescent material dispersed in an inorganic material having a predetermined shape,
Lighthouse lamps using laser diodes and phosphors. The method of claim 3,
Wherein the phosphor is at least one selected from the group consisting of (Y, Tb) ₂ Al ₅ O ₁₂ : Ce ³⁺ , (Sr, Ba, Ca) ₂ Si ₅ N ₈ : Eu ²⁺ , CaAlSiN ₃ : Eu ²⁺ , BaMgAl ₁₀ O ₁₇ : Eu ^{_{2+, BaMgAl 10 O 17: Eu}} 2+, Mn 2+, Ca-alpha-SiAlON: Eu 2+, Beta-SiAlON: Eu 2+, (Ca, Sr, Ba) 2 P 2 O 7: Eu 2+ , (Ca, Sr, Ba) 2 P 2 O 7: Eu 2+, Mn 2+, (Ca, Sr, Ba) 5 (PO 4) 3 Cl: Eu 2+, Lu 2 SiO 5: Ce 3+, (Ca, Sr, Ba) ₃ SiO ₅ : Eu ²⁺ , (Ca, Sr, Ba) ₂ SiO ₄ : Eu ²⁺ , Zn ₂ SiO ₄ : Mn ²⁺ , BaAl ₁₂ O ₁₉ : Mn ²⁺ , BaMgAl _{14 ^{O 23: Mn 2+, SrAl 12}} O 19: Mn 2+, CaAl 12 O 19: Mn 2+, YBO 3: Tb 3+, LuBO 3: Tb 3+, Y 2 O 3: Eu 3+, Y 2 ^{_{SiO 5: Eu 3+, Y 3}} Al 5 O 12: Eu 3+, YBO 3: Eu 3+, Y 0.65 Gd 0.35 BO 3: Eu 3+, GdBO 3: Eu 3+ , and YVO _4: Eu ³⁺ as And at least one selected from the group consisting of
Lighthouse lamps using laser diodes and phosphors. delete delete

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